Toy building brick



FIG. 1.1 is a front perspective view of my ornamental design for toy building brick;

FIG. 1.2 is a top plan view thereof;

FIG. 1.3 is a front elevational view thereof;

FIG. 1.4 is a side elevational view thereof;

FIG. 1.5 is a bottom plan view thereof; and

FIG. 1.6 is a bottom perspective view thereof. 

CLAIM The ornamental design for toy building brick, as shown and described. 